package com.dgut.czh;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.core.env.Environment;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;
import sun.applet.AppletEventMulticaster;

import java.util.concurrent.ThreadPoolExecutor;

@EnableConfigurationProperties(CustomProperties.class)
public class Lab2Autoconfig {

    @Bean
    @ConditionalOnProperty(prefix = "czh.auto", name = "enable", havingValue = "true")
    CommandLineRunner createCustomCommandLineRunner(Environment env){
        return new CustomCommandLineRunner(env);
    }

    /*
     * 自定义事件
     * */
    static class NoticeEvent extends ApplicationEvent {
        private static final Logger logger= LoggerFactory.getLogger(NoticeEvent.class);

        /*
         * 存储信息
         * */

        private final String message;

        public NoticeEvent(String message){
            super(message);
            this.message=message;
            logger.info("添加事件成功！message:{}",message);
        }

        public String getMessage(){return message;}
    }

    /*
     * 自定义事件监听器，监听 NoticeEvent事件
     * */
    @Component
    static class NoticeListener implements ApplicationListener<NoticeEvent> {
        private static final Logger logger = LoggerFactory.getLogger(NoticeListener.class);

        @Override
        public void onApplicationEvent(NoticeEvent noticeEvent){
            logger.info("事件监听器获取到 NoticeEvent，睡眠当前线程2秒。。。");
            try{
                Thread.sleep(2000);
            }catch (InterruptedException e){
                e.printStackTrace();
            }
            logger.info("NoticeEvent 的 message属性是 ： {}",noticeEvent.getMessage());
        }
    }


    @Bean("taskExecutor")
    public ThreadPoolTaskExecutor myTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //核心线程池大小
        executor.setCorePoolSize(10);
        //最大线程数
        executor.setMaxPoolSize(20);
        //队列容量
        executor.setQueueCapacity(200);
        //活跃时间
        executor.setKeepAliveSeconds(60);
        //线程名字前缀
        executor.setThreadNamePrefix("MyTaskExec-");
        // setRejectedExecutionHandler：当pool已经达到max size的时候，如何处理新任务
        // CallerRunsPolicy：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        executor.initialize();
        return executor;
    }

}
